Charles hall



(No Model.)

(LHALL.

PIPE WRENCH.

No. 523,810. l yPaenwd July 31,1894.

UNITED lSTATES PATENT OFFICE.

cnARLEs HALL, 'oF New YORK, N. Y.

PI PE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 523,810, dated July -31 1894. Application hemmt 5.1894. sen-a1 No. 502,310. (No model.)

To aZZ whom it may concern: Y nally screw-threaded so that the screw is Be it known that I, CHARLES HALL, a `citiscrewed through the collar and takes a bear'- zen of the United States, residing in the city, ing at the back end of the slot 3 to hold the 55 county, and State of New York, have invented screw in place; and it is advantageous to in- 5 an Improvementin Pipe-Wrenches, of which sert a pin 9 through the collar and through the following is a specification. the screw D to hold the collar in place, and

rIhe present invention is a modification of the portion of the screw shankor rod which .y an1mprovement upon the wrench represented passes through the handle A at the odset 8, [60 1n my Patent N o. 516,485, dated Marchl, is preferably cylindrical and as large as the IQ 1894' r `screw-thread, so that the screw may be in- In the present invention I make the lever serted through the hole in the handle and handle with anmoffset or bend adjacent to the screwed `into the collar 7 and also into the endl of the screw that occupies a slot in said pivot C which is in the form of a nut sliding 65 lever handle, so that the screw may be eonin the aforesaid groove 3 as in my aforesaid I 5 tinued as a plain circular rod through a hole application.

at the olset or shoulder so that the actuating The hook-shaped jaw E is slotted at the head for the screw comes at one side of the back end so that the plate portions 6 pass at handle and adjacent tothe shoulder, thereby each side of the handle lever A, and the pivot 7o rendering it unnecessary to provide separate C passes through holesin the portion 6 of the 2o bearing pieces as in my aforesaid application, jaw E, so that such jaw E swings upon the ,and I make the interior side of the hook with pivot C in receiving and acting uponthe pipe an offset to allow for -the introduction of a or other round article. larger sized pipe withoutthe necessity of pro- When the jaw E is in the position repre- 75 jecting the point of the hook beyond the line sented in Fig. l, the surface 5 ot' the hook- 25 of the lever handle when the swinging jaw is shaped jaw E is parallel with the surface 2 of brought up against the opposite edge of the the jaw at the end of the handle lever, so that lever handle, at whichV place such swinging the wrench can be used with nuts or bolt jaw is provided with a stop. I make use of heads or other polygonal articles, but instead 8o a spring tending to turn the swinging jaw toot the longitudinal inner surface of the hook 3o ward the lever handle, so as to prevent such being in line with the edge `of the handle 1eswinging jaw dropping away from the posiver and jaw, I make an odset so thatthe surtion in which it is made use of. face 10 of the swinging hook E is sufficiently In the drawings, Figure l is a side View of distant from the surface 11 of the handle le- 8 5 my improved wrench, partially in section. ver for the reception of the largest sized pipe 35 Fig. 2 is an elevation at right angles to Fig. to which Athe wrench is adapted, and at `the 1, and Fig. 3 is a section at the line w x of same time the point 12 of the hook will -lap Fig- 1- sufticiently upon such pipe to prevent the The lever handle A is made with a jaw 2 hook slipping and disengaging its vhold upon 9o at the end thereof, the surface of which is at the pipe, as indicated by dotted lines in Fig.

4o an acute angle so as to form a chisel edge 1; it being important that the point 12 of the adapted to press against the pipe or rod when hook E should be in line or nearly so with the same is being rotated, and this lever hanthe edge of the handle bar, so as to coincide dle A is formed with a longitudinal slot 3 with the jaw 2 at the end of-such handle bar 95 ,into which is received the screw D, and such when the hook is brought down into contact 45 ,screw passes through the lever handle at the therewith.

odset or shoulder 8 and terminates with a The bottom portion 14E of the slot between head or burr 4 by which the screw may be the portions 6 of the swinging jaw E forms a rotated, and the circular point of the screw is stop against the surface 11 of the handle bar roo received in a recess at the end of the slot 3 when the hook jaw E is swung up into the 4 5o and near the jaw 2, and to prevent the screw position shown in Fig. 1, and the bottom 13 D slipping out of place there is a collar of the slot between the portions 6 of the Jaw surrounding such screw and preferablyinter- E forms a stop to prevent the jaw E being swung back too far, as illustrated by the dotted lines, and in order to accurately adjust the position in which the swinging jaw E may be stopped in its relation to the handle bar and its jaw when grasping a pipe, I employ the screw H passing through the swinging jaw at or adjacent to the surface 14 and pressing against the edge 1l of the handle bar jaw, and this screw H should work easily so that it can be rotated by hand as the wrench is applied to the pipe so that when the handle bar jaw presses against the pipe with the desired force, the screw H can be turned in to take-a bearing against the surface 11 and prevent the pipe being crushed by undue pressure against the side thereof.

When the handle is moved in such a direction as to release the grip upon the pipe, the jaw E may swing away from the pipe and the wrench lose its hold thereon. To keep the jaw E up to its work, I provide a spring I one end of which is connected to the pivot C, and it is advantageously made in the form of au arc of a circle to act against a pin I upon the jaw E to move the hook end of the jaw E toward the position shown by full lines in Fig. 1, and this is also advantageous when the jaws of the wrench are applied to turn a nut or other polygonal article,because the spring I holds the jaw E in the normal position for the reception of such nut or polygonal article between the surface 5 of the hook E and the inclined end 2 of the handle lever.

To lessen the weight of the swinging' jaw E, the back edges of such jaw are beveled or formed as a rib with concave surfaces, as shown in cross section Fig. 3, thereby maintaining the proper width of operative surface upon said swinging jaw, and the necessary strength with as little weight as possible.

In cases where it is desired, teeth 16 may be provided along the side of the handle bar adjacent to the jaw 2, so as to act upon pipes of large diameter.

I claim as my invention- 1. The combination with the hook-shaped swinging jaw, of a pivot, a handle bar having a jaw at the end, a longitudinal mortise for the pivot of the swinging jaw, an oifset in the handle, and a screw acting upon the pivot pin and passing through the handle bar at the oset thereof and acting longitudinally l Within the mortise, substantially' as set forth.

nal mortise, of a screw within the mortise, a pivot piu against which the screw acts, a jaw having a hook at one end and receiving the pivot pin at the other end and slotted for the reception of the handle bar, the bottom 14 of the slot forming a stop against the side of the handle bar when the swinging jaw is in its normal position, substantially as set forth.

3. The combination with a handle bar having a jaw at the end thereof and a longitudinal mortise, of a screw within the mortise, a pivot pin against which the screw acts, a jaw having a hook at one end and receiving the pivot pin at the other end and slotted for the reception of the handle bar, the bottom 14 of the slot forming a stop against the side of the handle bar when the swinging jaw is in its normal position, such swinging jaw having an odset at 10 by which the elfective length of the hook-shaped jaw at the end is increased to adapt the wrench to the larger sizes of pipe, substantially as set forth.

4. The combination with a handle bar having a jaw at the end thereof and a longitudinal mortise, of a screw within the morti'se, a pivot pin against which the screw acts, a swinging jaw slotted at one end for the reception of the handle bar, a stop screw H passing through the swinging jaw and acting against the edge of the handle bar for arresting the movement of the parts after the pipe has been grasped, substantially as set forth.

5. The combination with a handle bar jaw slotted longitudinally, a pivot pin in the slot and a screw acting upon the pivot pin, of a swinging jaw slotted at one end and having holes through which the pivot pin passes, and a spring connected with the pivot pin and acting to move the swinging jaw toward the lever handle, substantially as set forth.

6'. The combination withthe swinginghookshaped jaw slotted at one end, of a'handle bar having a jaw at the end thereof and a slot for the pivot pin, an offset in the handle a screw passing through the offset and through the pivot pin and into a recess at the jaw end of the slot, and a collar around the screw at the other end of the slot for retaining the screw in position, substantially as set forth.

Signed by me this 27th day of February,

I CHAS. HALL. Witnesses:

GEO. T. PINCKNEY, A. M. OLIVER.

IOO 

